1931773940 has 24 divisors (see below), whose sum is σ = 4059589632. Its totient is φ = 772164000.

The previous prime is 1931773913. The next prime is 1931773951. The reversal of 1931773940 is 493771391.

It is a junction number, because it is equal to n+sod(n) for n = 1931773891 and 1931773900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4436 + ... + 62315.

It is an arithmetic number, because the mean of its divisors is an integer number (169149568).

Almost surely, 2^1931773940 is an apocalyptic number.

1931773940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1931773940 is an abundant number, since it is smaller than the sum of its proper divisors (2127815692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1931773940 is a wasteful number, since it uses less digits than its factorization.

1931773940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68207 (or 68205 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 1931773940 is about 43951.9503549046. The cubic root of 1931773940 is about 1245.4284080201.

The spelling of 1931773940 in words is "one billion, nine hundred thirty-one million, seven hundred seventy-three thousand, nine hundred forty".